Trillium cernuum
（重定向自Nodding trillium）
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Trillium cernuum (nodding trillium, nodding wakerobin, or whip-poor-will flower) is a species of Trillium native to northeastern North America, from Newfoundland west to southern Saskatchewan, and south to northern Virginia and Iowa. It occurs on rich, moist soils in both broadleaf and coniferous woodland.